Lovely, Google.
From my sweetheart's Chromebook this morning (the one she uses primarily for simple email and web-browsing), in order to obtain security updates you suggest a process that will remove the web-browser and email programs, and then disconnect her from the Play store where she might be able to obtain replacements/upgraded versions.
If I wanted to make it a useless brick that doesn't do web/email, I'd just turn it off.
Maybe the time has come to get her a new non-Chromebook?